Comb for carding machines



April 7, 1942. A. CAVEDON COMB FOR CARDING MACHINES Filed May 20, 1940 a.z T u m u 2 P. o o O O 6 .nfizzSiri; rEkFEFEl LLIEIIF FIFIIIIIIIIIIILIm a 0 F fll-exgjg ga dogg' Patented Apr. 1942 i i.

UNITED STATES PATENT OFFICE W.

i 2,278,611 f f COMB FOR- GARDING MACHINES Alexander Cavedon,Woonsocket, R. 71. Application May 20, 1940, Serial'No. 336,115 3Claims. (01. 19 -106 The present invention'relates to doffer combs forcarding machines, and has for its object to provide an improvedmechanism for moving a comb in a straight line, substantially tangentialto the periphery of a dofier roll.

In prior devices of this character combs have been mounted foroscillatory movement about an axis considerably spaced from the pointwhere the fibre web is stripped from the periphery .of the doffer roll.Such spacing is necessary in order that the comb will travel through anarc having a large radius, with the result that the dofied web musttravel a considerable distance without support, before entering betweenthe feed rolls of a condenser, or other device for operating on the web.V V

According to the present invention, there is provided an improvedmounting and operating mechanism for a doffer comb, whereby arectilinear movement is imparted to the comb, in a direction that isalways substantially tangential to the periphery of the doifer roll. Asa result, the mounting for the comb is close to the periphery of thedoffer roll, so that the web has only a short distance to travel beforeentering the rolls of the condenser or other associated device.Furthermore, the comb is so mounted that it may be closely adjusted withrespect to the periphery of the dofier roll, without affecting thetangential direction of its reciprocatory movement.

The above and other advantageous features of the invention willhereinafter more fully appear, from the following description consideredin connection with the accompanying drawing, in which:

Fig. 1 is a view in side elevation of a portion of a dofier roll havinga comb mechanism cooperating therewith, in accordance with the presentinvention.

Fig. 2 is a plan view of a portion of the parts shown in Fig. 1.

Fig. 3 is a fragmentary sectional view, along the line 3-3 of Fig. 2.

Fig. 4 is a view in front elevation of the assembled parts of the comboperating mechanism removed from the doffer roll.

Fig. 5 is a fragmentary sectional view along the line 5-5 of Fig. 4, andillustrating adjustment of the comb relative to the doffer roll.

Referring to the drawing, the comb structure of the present invention isshown in connection with a portion of a carding machine having a dofierroll I, from which a fibre web 2 is stripped by a comb 3 having astraight line movement, as

later described. Beyond the comb 3, and very close to the point wherethe web is stripped from the dofier roll, there is shown a 'pair ofopposed w'eb' receiving rolls 4, such, for example, as the dividingrolls of a condenser for operating on the stripped web, in'the usualmanner. The position of these rolls 4 illustrates their 'extremely closerelation to periphery of the doffer roll I, which is made possible by myimproved comb support, and which relation would not be possible with theconventional type of comb mounted for oscillatory movement about anaxis.

A portionof the frame of the carding machine is indicated at F, and asshown in Fig. 4, brackets 5 are mounted on this frame at eache nd of thedoifer roll I, for supporting-between them a pair of'supports 6 forthecomb assembly. The supports 6 are secured to the brackets 5 by means ofbolts I, and each support has an arcuate slot 8 therein for receivingone of the bolts I, thereby making it possible to adjust the entire combassembly with respect to the periphery of the doffer roll, as will laterappear.

As best shown in Figs. 2 and 4, each support 6 provides a vertical slot9, in which is received a plunger II), with the upper ends of theplungers I0 providing inwardly extending projections I I terminating inarms I2 extending downwardly between the supports. The arms I2 areconnected by a horizontal bar I 3, to which the comb 3 is attached, sothat movement of the plungers II) in the supports 6 will impart straightline movement to .the comb 3, in a direction substantially tangential tothe periphery of the doffer roll I, as best shown in Fig. 5.

It is to be noted that the cross bar I3 carrying the comb 3 is movableas a unit with the plungers I0 and their connected arms I2, so that thecomb 3 always moves in a straight line determined by the parallelrelation between the plungers I0.

Referring again to Fig. 1, each support 6 has mounted thereon a bracketl4 and the opposite brackets I4 support a horizontally extending shaftI5. Adjacent the ends of this shaft are positioned gear segments I6meshing with rack teeth I! on the plungers III. A depending arm I8 onthe shaft I5 has attached thereto one end of a connecting rod I9, theother end of which is connected by a pin l9a on a crank disk 20 turnablewith a pulley 2| journalled on a stud 22 on one of the supports 6. Asuitable belt 23 drives the pulley 2 I, and thereby causes oscillationof the gear segments Hi to impart a vertical reciprocatory movement tothe plungers l0,

in unison. The connection between the arm I 8 and the connecting rod (9is preferably adjustable by means of a slot 24 in the arm, to controlthe extent of the comb travel. In operation it has been found that thegear segments I 6 are adapted to impart a reciprocatory movement to theplungers l and the comb assembly supported therebetween, without anysubstantial vibration being imparted to the comb as might otherwiseoccur with a direct driving connection to the comb bar.

By the arrangement shown, the comb 3 is given a vertical reciprocatorymovement substantially tangential to the periphery of the dofier roll I,and the length of the reciprocatory movement may be varied by adjustmentof the connecting rod l9 and arm I8. Moreover, by angular adjustment ofthe supports 6 about the bolts 1 opposite to the slots 8, the spacing ofthe operative edge of the comb 3 from the periphery of the dofler roll Imay be closely adjusted to suit difl'erent conditions of operation, asindicated in dotted lines in Fig. 5. It will be also noted that themounting for the comb is such that lint or dust from the materialpassing through the carding machine will not interfere with the properfunctioning of the mechanism. In addition, the comb supporting andreciprocating mechanism is so located that it does not guide, a combextending between the supports and having upwardly extending projectionson opposite ends thereof, means for connecting each of the projectionsto the adjacent plunger adjacent the top thereof, and means actingdirectly on said plungers for reciprocating them in unison.

2. In a carding machine having a dofier roll, a bracket positionedadjacent each end of the roll, a support adjustably mounted 'on eachbracket, each support having a substantially vertical guide therein, aplunger positioned in each guide, a comb extending between the supportsand having upwardly extending projections on opposite ends thereof,means for connecting each of the projections to the adjacent plungeradjacent the top thereof, and means for reciprocating the plungers inunison, said last means including a pair of gear segments, and means foroscillating said gear segments simultaneously, each of said plungershaving teeth thereon engageable by the gear segments.

3. A combing device for the doffer roll of a carding machine comprisingin combination spaced supports positioned adjacent the ends of saidroll, with each support having a straight guideway therein, plungersmovable in said guideways, with the horizontally alined ends of saidplungers supporting between them a comb bar carrying a comb having itsteeth adjacent the periphery of said dofi'er roll, a shaft extendingbetween said supports carrying operating members engaged with saidplungers, and means for imparting oscillatory movement to said shaftwhich is converted into straight line movement of said plungers by saidoperating members.

ALEXANDER CAVEDON.

